Arrangement for the generation of oscillations



Jar 1. 17, 1928. 1,656,195

K. HEEGNER ARRANGEMENT FOR THE GENERATION OF OSCILLATIONS Filed Oct. 25. 1925 INVENTOR KURT HEEGNER TORNE'Y Patented Jan. 17, 1928.

UNITED STATES PATENT OFFICE.

KUB'I HEEGNER, OF BERLIN, GERMANY, ASSIGNOB T0 GEBELZBCHAFT FU'B DB-AHE- LOSE TELEGRAPH-IE M. B. H. HALLESCHES UFEB, OF BERLIN, GEREANY, A. COB" YORATION OF GERMANY.

ARRANGEMENT FOB THE GENERATION OF OSGILLATIONS.

Application filed October 23, 1925, Serial No. 64,822, and in Germany October 31, 1924.

The present invention covers an arrangement adapted to the production of oscillations, and the same is based upon the principle that in oscillation circuits which are intercoupled through iron-cored choke coils, oscillations may arise at a frequency which bears a certain linear relationship to the nat-v ural frequency of the oscillation circuit when the magnetization of the iron core or iron cores is effected. Now, in accord ance with this invention, two alternating current magnetized iron cores are so interconnected by a winding that at this winding no idle (no-load) voltages are induced, and that this winding is inserted in an oscillation circuit which is tuned to the fundamental wave or a higher harmonic'of the alternating current.

The invention will be better understood from the following description when considered in connection with the accompanymg? drawing on which:

ig. 1 is a diagrammatic view of one embodiment of the invention.

Fig. 2 is a modification of the form shown in Fig. 1.

Referring to Fig. 1 two iron-cores K K are oppositely magnetized by an alternating current having a frequency w. The ironcores are embraced by a common or joint winding L so that the direction of magnetization is in opposite directions as indicated by the arrows. The disposition of the winding L is so chosen that no voltages of the fundamental frequency 'w are produced. The windings L are closed by way of a coil L and a capacitance C, and the entire circuit is tuned to an oscillation the frequency of which is equal to mw, where m is the relationship between the frequency of the circuit in which oscillations are excited, and the frequency of the alternating current. In case of higher frequency raising,

also an auxiliary circuit could be .ised which would be tuned to a lower period, and which is caused to vibrate at a frequency which is equal to its natural period.

This case in which two auxiliary circuits are used which are tuned to frequencies w and 1.0,, while the impressed frequency is 10 is illustrated in Fig. 2. Theoretical and experimental investigation has shown that the sum total of the frequencies of the two The embodiment of the invention illustrated and described herein has been selected for the purpose of clearly setting forth the principles involved. It will be apparent, however, that the invention is susceptible of belng. further modified to meet the differcut conditions encountered in its use and- I therefore aim-to cover by the appended claims all modifications within the true spirit and scope of'this invention.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. In a system of the character described the combination of an alternating current source having a fundamental frequency and means to generate the higher harmonics of said source comprising, two iron cores adapt ed to be oppositely magnetized by said alternating current, a coil wound about said cores, and a circuit tuned to the desired harmonic connected to said coil.

2. In a system of the character described the combination of an alternating current source having a fundamental frequency and means to generate the higher harmonics of said source comprising, two iron cores adapted to be oppositely magnetized by said alternating current, two circuits each of which includes a single coil wound on said iron cores and means for tuning said circuits, whereby the desired frequency is generated in one thereof.

3. In a frequency changer two oppositely magnetized iron cores, two windings each emt acing both said cores, two independently operating tunin circuits each connected to one of the win ings, means comprising one of said tuning circuits for controlling the frequency of the other.

KURT HEEGNER. 

